Python web crawler notes (3): Download blog garden essay to Word document

(1) Description Based on the previous one, we use lxml to extract the body content of blog garden essay and save it in Word document. The following modules are used to operate Word documents: pip install python-docx Modified code (mainly added the following paragraph in the while loop of link_crawler()) 1 tree = lxml.html.fromstring(h ...

Posted by phpDVWeaver on Tue, 31 Mar 2020 01:56:38 -0700

Python3 Standard Library: Multprocessing manages processes like threads

1. Multprocessing manages processes like threads The multiprocessing module contains an API that is based on the threading API and divides work into multiple processes.In some cases, multiprocessing can replace threading as a temporary replacement to utilize multiple CPU cores, thereby avoiding computing bottlenecks caused by Python global inte ...

Posted by laurton on Mon, 30 Mar 2020 18:55:34 -0700

Detailed analysis of big integer type BigInteger written in C + +

subject Detailed analysis of big integer type BigInteger written in C + + Narration Large integer class generally appears in the problem of accuracy in algorithm problems. Although there are large integer classes available in Java, and they are easy to use, we can also understand the implementation of large integer ...

Posted by jotgabbi on Mon, 30 Mar 2020 08:21:19 -0700

Python3 Standard Library: Managing concurrent operations in threading processes

1. Manage concurrent operations in threading processes The threading module provides an API to manage the execution of multiple threads, allowing programs to run multiple operations concurrently in the same process space. 1.1 Thread object The easiest way to use Thread is to instantiate a Thread object with a target function and call start() to ...

Posted by j.smith1981 on Sun, 29 Mar 2020 18:54:15 -0700

Java integrated Alibaba big fish platform SMS service sending verification code -- supplement registration part

It's still the previous chart 1, back end Server verification needs to be performed again before registration Is the user name registered Is the mobile number registered Whether the verification code is wrong Whether the verification code is implemented Password is encrypted with BCrypt Controller layer The method of user name verificatio ...

Posted by nexgen_x on Fri, 27 Mar 2020 08:14:08 -0700

C × basic knowledge series - 3 set array

Let's briefly introduce the collection. Generally speaking, it's a scheme used to store multiple data. For example, we are a company's warehouse management. The company has a lot of goods that need to be managed. There are similar goods and different kinds of goods. In a word, they are many and messy. If we manage the warehouse according to th ...

Posted by trooper on Fri, 27 Mar 2020 05:51:47 -0700

Uoj × 34. Polynomial multiplication (NTT)

This is a template problem. Here are two polynomials. Please output the multiplied polynomials. Input format In the first line, two integers nn and mm represent the degree of two polynomials respectively. The second line, n+1n+1 integers, represents the coefficients of the terms from 00 to nn of the first polynomial. The third line m+1m+1 ...

Posted by phpvolution on Thu, 26 Mar 2020 09:03:46 -0700

python basic learning day12 generator and derivation

Add: the function cannot change the global immutable variable, and the variable variable can still be changed. l1 = [1,2] def a(l1): l1.pop(1) a(l1) print(l1) generator Generator: the python community regards generator and iterator as the same kind, and the essence of generator is iterator. The only difference is that the generator is ...

Posted by dbrimlow on Thu, 26 Mar 2020 02:07:41 -0700

JavaScript Modular Development

What is modular development? In front-end development, it can achieve some basic interaction effect as long as several dozens or hundreds of lines of code are embedded in script tags at first. Then js is valued and widely used. The help of jQuery, Ajax, Node.Js, MVC, MVVM, etc. also makes front-end development important and makes front-end pro ...

Posted by pmjm1 on Mon, 23 Mar 2020 10:53:05 -0700

Source Interpretation of Golang's sync.Map Implementation Principle

brief introduction Gos built-in maps do not support concurrent write operations, because map write operations are not concurrently secure. When you try multiple Goroutine operations on the same map, an error occurs: fatal error: concurrent map writes. So sync.Map has been officially introduced to accommodate concurrent programming applications. ...

Posted by skeener on Sun, 22 Mar 2020 22:56:00 -0700